Whether taking the form of blazing flame, crackling ice, sizzling lightning, or thunderous storm, elemental spirits shoot forth to do your enemy harm.

At-Will   ✦     Primal, Varies, Weapon
Standard Action      Ranged weapon

Target: One creature

Special: Choose cold, fire, lightning, or thunder whenever you use this power. Your choice determines the power's damage type.

Attack: Wisdom vs. AC

Hit: 1[W] + Wisdom modifier damage of the chosen type. Until the end of your next turn, any creature that starts its turn adjacent to the target takes damage of the chosen type equal to your Dexterity modifier.
    Level 21: 2[W] + Wisdom modifier damage of the chosen type.

Published in Player's Handbook 3, page(s) 118.